答案1
您可以将frametitle
模板重新定义为如下形式:
\documentclass{beamer}
\setbeamercolor{frametitle}{fg=white, bg=orange}
\setbeamertemplate{frametitle}{\colorbox{frametitle.bg}{\usebeamercolor[fg]{frametitle}\usebeamerfont{frametitle}\insertframetitle}}
\begin{document}
\begin{frame}[plain]{This is my frame}
Lore impsum dolor sit amet...
\end{frame}
\end{document}